http://www.osce.org/ukraine-smm/126480
The existence of military grade jamming capacities within Donetsk region, as used on 3 November against the SMM unmanned aerial vehicle (UAV), remains a substantial concern for UAV flights. Following a flight risk assessment, the SMM UAV was not deployed on 6 November.
Станция РЭБ 1РЛ257 «Красуха-4» для глушения беспилотников. Стоит около корпуса ДонНТУ в Донецке
http://nvua.net/ukraine/v-donecke-terroristy-ustanovili-rossiyskuyu-glushilku-signalov-aviacii-19578.html